import importlib.util
from pathlib import Path

import pytest

spec = importlib.util.spec_from_file_location("supervision", Path(__file__).resolve().parents[1] / "scripts/summarize_agent_supervision.py")
module = importlib.util.module_from_spec(spec)
spec.loader.exec_module(module)


def record(*proposals):
    return {"agent_id": "fixture", "scope": "synthetic", "mode": "supervised", "proposals": list(proposals)}


def proposal(identity, disposition="accepted_unchanged", outcome="succeeded", refinement=False):
    approved = "original" if disposition == "accepted_unchanged" else "revised"
    return dict(proposal_id=identity, disposition=disposition, outcome=outcome,
                original_digest="original", approved_digest=approved, executed_digest=approved,
                approval_ref="synthetic-approval", verification_ref="synthetic-verification",
                refinement_or_rescue=refinement)


def test_no_sample_is_unknown_and_cannot_grant_authority():
    report = module.summarize(record())
    assert report["unchanged_acceptance_rate"] is None
    assert report["unchanged_execution_success_rate"] is None
    assert report["authority_granted"] is False


def test_revisions_rejections_and_rescue_do_not_earn_unchanged_success():
    report = module.summarize(record(proposal("one"), proposal("two", "accepted_revised"),
        proposal("three", refinement=True), proposal("four", "rejected", "not_executed")))
    assert report["unchanged_acceptance_rate"] == 2 / 4
    assert report["unchanged_execution_success_rate"] == 1 / 3


def test_approval_alone_is_not_execution_success():
    report = module.summarize(record(proposal("one", outcome="not_executed")))
    assert report["unchanged_acceptance_rate"] == 1
    assert report["unchanged_execution_success_rate"] is None


def test_duplicate_trials_and_unapproved_revisions_are_rejected():
    with pytest.raises(ValueError):
        module.summarize(record(proposal("same"), proposal("same")))
    wrong = proposal("one"); wrong["executed_digest"] = "unapproved"
    with pytest.raises(ValueError):
        module.summarize(record(wrong))


def test_unscored_history_remains_visible_without_manufacturing_a_rate():
    report = module.summarize(record(proposal("historic", "unscored", "failed", True)))
    assert report["counts"]["unscored"] == 1
    assert report["counts"]["outcome_failed"] == 1
    assert report["counts"]["refinement_or_rescue"] == 1
    assert report["unchanged_acceptance_rate"] is None
    assert report["unchanged_execution_success_rate"] is None